<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/Welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-button type="primary">添加角色</el-button>
      <!-- 角色列表显示区域 -->
      <el-table :data="rolesList" border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bgBottom', i1 == 0 ? 'bgTop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级，三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环渲染二级权限 -->
                <el-row
                  :class="[i2 == 0 ? '' : 'bgTop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      type="success"
                      >{{ item2.authName }}</el-tag
                    >
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      closable
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 列表操作索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button icon="el-icon-edit" size="mini" type="primary"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="rolesDelete(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed">
      <!-- 树形空间 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox
      node-key="id" default-expand-all :default-checked-keys='defKeys'
      ref='treeRef'></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolesList: [],
      //控制分配权限对话框显示与隐藏
      setRightDialogVisible:false,
      //所有权限的数据
      rightsList:[],
      //树形控件的属性绑定对象
      treeProps:{
          label:'authName',
          children:'children'
      },
      //默认选中的节点ID值数组
      defKeys:[],
      //当前即将分配权限的角色id
      roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取角色列表数据
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) return this.$message.error("获取数据失败");
      this.rolesList = res.data;
      console.log(this.rolesList);
    },
    async rolesDelete(id) {
      const confirmResult = await this.$confirm("是否删除用户?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      }).catch((err) => err);
      if (confirmResult !== "confirm") return this.$message.info("取消了删除");

      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        this.$message.error("删除失败");
      }
      this.$message.success("删除成功");
      this.getRolesList();
    },
    //根据ID删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") return this.$message.info("取消了删除");
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) return this.$message.error("删除失败");
      role.children = res.data;
    },
    //分配权限对话框
    async showSetRightDialog(role) {
        this.roleId = role.id;

        //获取所有权限数据
        const {data:res} = await this.$http.get('rights/tree');
        if (res.meta.status !==200) return this.$message.error('获取权限列表失败')
        //获取到的权限数据保存到rightsList中去
        this.rightsList = res.data;
        //递归获取三级节点的ID
        this.getLeafKeys(role,this.defKeys);

        this.setRightDialogVisible=true;
        console.log(this.rightsList)
    },
    //通过递归的形式,获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node,arr){
        //如果当前node节点不包含children属性，则是三级节点
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item => this.getLeafKeys(item,arr));
    },
    //监听分配权限对话框关闭事件
    setRightDialogClosed(){
        this.defKeys=[];
    },
    //点击为角色分配权限
    async allotRights(){
        const keys=[
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys(),
        ];
        //把keys中数据以逗号进行拼接
        const idStr = keys.join(",");
       const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        if (res.meta.status !== 200) {
            return this.$message.error('权限添加失败');
        }
        this.$message.success('权限添加成功');
        this.getRolesList();
        this.setRightDialogVisible=false;
    }
  },
};
</script>

<style>
</style>